Let G be a primitive strongly regular graph G such that the regularity is less than half of the order
of G and A its matrix of adjacency, and let A be the real Euclidean Jordan algebra of real symmetric matrices of
order n spanned by the identity matrix of order n and the natural powers of A with the usual Jordan product of
two symmetric matrices of order n and with the inner product of two matrices being the trace of their Jordan
product. Next the spectra of two Hadamard series of A associated to A2 is analysed to establish some conditions
over the spectra and over the parameters of G.
Type (Professor's evaluation):
No. of pages: